Caption: Stonehenge, aerial photograph. Stonehenge is an ancient arrangement of large standing stones on Salisbury Plain, England. It is thought to have been built around 2000 BC by neolithic peoples. Some of the stones are thought to form markers that indicate rising and setting points for the Sun and the Moon, allowing accurate prediction of forthcoming lunar and solar eclipses. The circular shape surrounding the stones is a ditch which formed a henge approximately 1500 years before the stones were brought to the site.